Dec 18 12:38:49.134 INFO checking quickercheck-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 12:38:49.134 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/quickercheck/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 12:38:49.460 INFO [stdout] 49ae4ab5f435e7e0d3deb4494887fa460c50e33a8c5f49cf5d77f721138177b5
Dec 18 12:38:49.462 INFO running `"docker" "start" "-a" "49ae4ab5f435e7e0d3deb4494887fa460c50e33a8c5f49cf5d77f721138177b5"`
Dec 18 12:38:50.706 INFO [stderr]     Checking quickercheck v0.2.0 (/opt/crater/workdir)
Dec 18 12:38:51.407 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.407 INFO [stderr]    --> src/arbitrary.rs:108:48
Dec 18 12:38:51.407 INFO [stderr]     |
Dec 18 12:38:51.407 INFO [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
Dec 18 12:38:51.407 INFO [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.407 INFO [stderr] ...
Dec 18 12:38:51.407 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.407 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.408 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.408 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.408 INFO [stderr] ...   |
Dec 18 12:38:51.408 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.408 INFO [stderr] 128 | | }
Dec 18 12:38:51.408 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.408 INFO [stderr]     |
Dec 18 12:38:51.408 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 18 12:38:51.408 INFO [stderr] 
Dec 18 12:38:51.408 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.408 INFO [stderr]    --> src/arbitrary.rs:112:47
Dec 18 12:38:51.408 INFO [stderr]     |
Dec 18 12:38:51.408 INFO [stderr] 112 |                       FromIteratorShrinker::new(($($placeholder::shrink()),*))
Dec 18 12:38:51.408 INFO [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.408 INFO [stderr] ...
Dec 18 12:38:51.408 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.408 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.408 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.408 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.408 INFO [stderr] ...   |
Dec 18 12:38:51.408 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.408 INFO [stderr] 128 | | }
Dec 18 12:38:51.408 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.408 INFO [stderr] 
Dec 18 12:38:51.408 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.409 INFO [stderr]    --> src/arbitrary.rs:108:48
Dec 18 12:38:51.409 INFO [stderr]     |
Dec 18 12:38:51.409 INFO [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
Dec 18 12:38:51.409 INFO [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.409 INFO [stderr] ...
Dec 18 12:38:51.409 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.409 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.409 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.409 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.409 INFO [stderr] ...   |
Dec 18 12:38:51.409 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.412 INFO [stderr] 128 | | }
Dec 18 12:38:51.412 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.412 INFO [stderr] 
Dec 18 12:38:51.420 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.420 INFO [stderr]    --> src/arbitrary.rs:108:48
Dec 18 12:38:51.420 INFO [stderr]     |
Dec 18 12:38:51.420 INFO [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
Dec 18 12:38:51.420 INFO [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.420 INFO [stderr] ...
Dec 18 12:38:51.421 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.421 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.421 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.421 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.421 INFO [stderr] ...   |
Dec 18 12:38:51.421 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.421 INFO [stderr] 128 | | }
Dec 18 12:38:51.421 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.421 INFO [stderr]     |
Dec 18 12:38:51.421 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 18 12:38:51.421 INFO [stderr] 
Dec 18 12:38:51.421 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.421 INFO [stderr]    --> src/arbitrary.rs:112:47
Dec 18 12:38:51.421 INFO [stderr]     |
Dec 18 12:38:51.421 INFO [stderr] 112 |                       FromIteratorShrinker::new(($($placeholder::shrink()),*))
Dec 18 12:38:51.421 INFO [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.421 INFO [stderr] ...
Dec 18 12:38:51.421 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.421 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.421 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.421 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.422 INFO [stderr] ...   |
Dec 18 12:38:51.422 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.422 INFO [stderr] 128 | | }
Dec 18 12:38:51.422 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.422 INFO [stderr] 
Dec 18 12:38:51.422 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 18 12:38:51.422 INFO [stderr]    --> src/arbitrary.rs:108:48
Dec 18 12:38:51.422 INFO [stderr]     |
Dec 18 12:38:51.422 INFO [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
Dec 18 12:38:51.422 INFO [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 12:38:51.422 INFO [stderr] ...
Dec 18 12:38:51.422 INFO [stderr] 119 | / generic_impls! {
Dec 18 12:38:51.422 INFO [stderr] 120 | |     Vec<T>,
Dec 18 12:38:51.422 INFO [stderr] 121 | |     BTreeMap<K, V>,
Dec 18 12:38:51.422 INFO [stderr] 122 | |     BTreeSet<T>,
Dec 18 12:38:51.422 INFO [stderr] ...   |
Dec 18 12:38:51.422 INFO [stderr] 127 | |     VecDeque<T>
Dec 18 12:38:51.422 INFO [stderr] 128 | | }
Dec 18 12:38:51.422 INFO [stderr]     | |_- in this macro invocation
Dec 18 12:38:51.422 INFO [stderr] 
Dec 18 12:39:02.505 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.89s
Dec 18 12:39:03.588 INFO running `"docker" "inspect" "49ae4ab5f435e7e0d3deb4494887fa460c50e33a8c5f49cf5d77f721138177b5"`
Dec 18 12:39:03.904 INFO running `"docker" "rm" "-f" "49ae4ab5f435e7e0d3deb4494887fa460c50e33a8c5f49cf5d77f721138177b5"`
Dec 18 12:39:04.188 INFO [stdout] 49ae4ab5f435e7e0d3deb4494887fa460c50e33a8c5f49cf5d77f721138177b5